docs: def get_firmware(self, components=()):
          """Retrieve OEM Firmware information
          """
          self.oem_init()
          mcinfo = self.xraw_command(netfn=6, command=1)
          bmcver = '{0}.{1}'.format(
              ord(mcinfo['data'][2]), hex(ord(mcinfo['data'][3]))[2:])
          return self._oem.get_oem_firmware(bmcver, components)